Need help!!!!! lookin for power supply and shutdown controller.

Hi let me start by thanking you for taking your time and reading my post.
Ok i have a miniQ pc.. It has p4 motherboard and i have 1.7 intel celeron in it. I want it dc to dc power supply for it and i want the shutdown controller for it. Does anyone know where i can get this at? If yes please email me at [email protected]